Finding the Third Proportional to 647,699 and 905,732

Step by Step Solution

1. Step 1: Write the proportion equation
   647,699 : 905,732 = 905,732 : x
2. Step 2: Convert to fraction form
   647,699/905,732 = 905,732/x
3. Step 3: Cross multiply
   647,699x = 905,732 × 905,732
4. Step 4: Simplify right side
   647,699x = 820,350,455,824
5. Step 5: Solve for x
   x = 820,350,455,824/647,699
6. Step 6: Final answer
   x = 1,266,561.25